ZHUANG Ying, WANG Liquan, LIN Jiaping. SELF-ASSEMBLY BEHAVIOR OF SUPRAMOLECULAR DIBLOCK COPOLYMER/HOMOPOLYMER MIXTURES WITH NON-COVALENT BONDING INTERACTIONS IN SELECTIVE SOLVENTS[J]. Acta Polymerica Sinica, 2011,(11):1320-1328.
Self-assembly of supramolecular AB diblock copolymer/C homopolymer mixtures in selective solvents was examined by real-space self-consistent field theory.The non-covalent bond is formed between the free end of hydrophobic B block of amphiphilic AB diblock copolymer and one end of hydrophobic C homopolymer
and thereby the mixtures consist of unbonded AB diblock copolymers
unbonded C homopolymers and supramolecular ABC triblock copolymers.The constitutions of the mixtures are dependent on the non-covalent bonding strength and the initial AB/C mixing ratio
which are essential to the morphologies of the self-assembled micelles.The AB diblock copolymer/C homopolymer mixtures are self-assembled into a variety of micelles such as core-shell-corona micelles and wormlike micelles in selective solvents.With increasing the bonding strength
the volume fraction of supramolecular ABC triblock copolymers increases
and that of unbonded AB diblock copolymers and C homopolymers decreases.In this process
transitions from core-shell-corona micelles to wormlike micelles were observed.In the core-shell-corona micelles
the bonded C homopolymers are distributed at the hydrophobic/hydrophilic interface
while the unbonded C homopolymers are dispersed in solvents due to their weak hydrophobic property.In the wormlike micelles
most bonded C homopolymers localize between two cores in one micelle
while the unbonded C homopolymers transit to the center of C domains.With increasing the volume fraction of homopolymers
the volume fraction of supramolecular ABC triblock copolymers increases to a maximum and then decreases.The morphological transitions of these micelles were also observed as a function of the volume fraction of homopolymers.The work provided an insight into the effect of non-covalent bonds on the morphology of supramolecular micelles.
关键词
非共价键自洽场理论超分子胶束
Keywords
Non-covalent bondSelf-consistent field theorySupramoleculeMicelle